> Most hires will take a year to get productive (where they produce more value for the company than they cost).

I never fully understood this. In pretty much any company I worked, if by the end of the month you weren't productive (almost fully independent) you would get the boot. Do companies really expect for new employees to take a year to be consistently productive? In startup land, that is like 2-3 product launches, how the hell companies find the money for this?